Tris would have been able to help with the herbs, but she's not here so I'll have to make due. It's possible we could grow them. I know botany fairly well, but I hated botany so it's not my favourite. I relied on purchasing my ingredients rather than growing my own.
I can absolutely take a look. When we were there, I collected some herbs that I could find for various potions. It may have to suffice for now, but if we head somewhere with a more robust selection, we might go and take a look.